INVESTIGATION OF GAMMA RADIATION FROM NUCLEAR REACTIONS
Abstract
Gamma radiati n from nuclear reactions was studied by means of a time-of-flight spectrometer (trochoid spectrometer). The spectrometer was used in connection with an 80-cm cyclotron. The reaction F-19 (proton, alpha particle) O-16 was studied. A thick target of CaF2 was bombarded with 3.5 mev protons and the resulting gamma radiation was allowed to fall upon a converter at a distance of 5 cm from the target. First an aluminum converter was used and the Compton electrons were analyzed according to the flight time in the spectrometer. Electronic equipment was later constructed which made it possible to use the instrument as a pair spectrometer. In this case a gold converter was used and the flight times of the positrons and the negatrons were recorded and combined so that a gamma spectrum could be immediately obtained on a 100-channel pulse-height analyzer. Results of such measurements are shown in fig. 5. In accordance with the well-known level scheme of O-16 three gamma lines with the energies 6.14, 6.92 and 7.12 mev are observed. These values are taken from the literature and the measurements reported should be considerered as a calibration of the spectrometer. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 1961
- Accession Number
- AD0262190
Entities
People
- K.g. Malmfors